Submerged Structural Response to Weak Shock by Coupled Three-Dimensional Retarded Potential Fluid Analysis - Finite Element Structural Analysis.

Abstract

The discretized Kirchhoff retarded potential integral equation for solving the linear acoustic wave equation is coupled to a general finite element structural analysis code to model underwater vibrations. Arbitrary three dimensional problems can be handled, with a present restriction on the allowed orientation of the finite element grid lines and the requirement of a plane wave form. Ramp and Fourier series approximations to a step wave are applied to rigid and elastic spheres to test the numerical formulation, and to test the validity of using a continuous approximation to a discontinuous loading. Keywords: Potential integral, Field analysis, Coupled, Fluid structure interaction, Submerged, Structural response.

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Document Details

Document Type
Technical Report
Publication Date
May 21, 1987
Accession Number
ADA182320

Entities

People

  • Martin A. Tamm
  • Waylon W. Webbon

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Waves
  • Computations
  • Elastic Shells
  • Equations
  • Fourier Series
  • Frequency
  • Geometry
  • Integral Equations
  • Plane Waves
  • Security
  • Structural Analysis
  • Structural Response
  • Three Dimensional
  • Time Intervals
  • Vibration
  • Wave Equations
  • Waveforms

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Structural Dynamics.